This tester performs a quick test of a 6502 CPU to determine if the chip is likely to be good or is faulty/fake.

It does this by presenting a permanent "NOP" (No Operation) instruction on the data pins, so that when a good device under test is powered up or reset, it will step through all the 64k addresses in sequence and the progress is displayed by the LED's.

Features:

• Drives the CPU under test at 1MHz, 2MHz, or a slower, more visible, speed, switch selectable
• The slow speed can be varied by means of the on-board potentiometer
• Switch selection of 6502 or W65C02 CPU variants
• "Halt" button to test for "Sally" variant
• "Reset" button to start the CPU without having to switch the tester off/on
• LED's display the status of most of the address lines
• ZIF (Zero Insertion Force) socket for the CPU to be tested
• USB-C socket for connecting power to the tester from any USB power adapter
• Power On/Off indicator LED
• Fully through-hole technology (except the USB-C socket)
• Mounting holes enabling the tester to be fitted into a case or on feet
• Full details via a downloadable PDF document

Note that this tester provides an indication that the device is faulty or fake, or is likely to be good. Due to the complexity of the CPUs, it cannot guarantee that the device is working perfectly.